Finding the Fourth Proportional to 357,455.50, 536,019.73 and 213,426.69

Step by Step Solution

1. Step 1: Write the proportion equation
   357,455.50 : 536,019.73 = 213,426.69 : x
2. Step 2: Convert to fraction form
   357,455.50/536,019.73 = 213,426.69/x
3. Step 3: Cross multiply
   357,455.50x = 536,019.73 × 213,426.69
4. Step 4: Simplify right side
   357,455.50x = 114,400,916,748.59
5. Step 5: Solve for x
   x = 114,400,916,748.59/357,455.50
6. Step 6: Final answer
   x = 320,042.40